The OEM Ibm Usb Ergonomic Scroll Mouse B925z (made by Logitech for IBM) should be 100% plug and play in Windows XP. If it isn't then you have Plug and Play disabled in BIOS setup or the mouse (or it's cable/connector) is defective.

Did this device come packaged with your computer system when first purchased? If yes, name the computer brand and model. Has it ever worked for you? What happens when you plug it into a working usb port?